Would you like to go to aquarium with me tomorrow ?—Sorry . I there twice this year and don’t want to go there again.

I don’t have a partner to practice English ______. [ ]

our earth, or else it will be no longer fit for us to live on.

More wild tigers have been seen in the forest around this area, ________ there used to be very few.

Ann, _____ the lights when you leave the classroom.